Fix: Changing Conditions for nextjsProjectExists

[DhairyaMajmudar]

Changed the conditions from checking if package.json exists or not to next.config.mjs exists in the command/inti/index.ts file

Closes #187

[DhairyaMajmudar]

@nicoalbanese pls. have a look : )

[nicoalbanese]

Hey! Can you update this to look for any file that has next.config.*

This is because a next config could be .js
https://nextjs.org/docs/pages/api-reference/next-config-js

[DhairyaMajmudar]

@nicoalbanese I have committed the suggested changes.

[diagomike]

also in \src\commands\add\auth\lucia\utils.ts - line 231-234

const path = "next.config.mjs";
  const ncExists = existsSync(path);
  if (!ncExists) {
    console.log("Could not find `next.config.mjs`. Please update it manually.");
  }

while setting up lucia authentication - it assumes only .config.mjs - for a complete fix addressing this too might be nice